风管压损计算

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,编号,名称,排风量（Q）,风速（V）,面积（A）,管径（D),速度压（Pv）,压损系数/局部阻力系数,直管（mmH2O/m）,,压力损失（mmH2O/m）,,静压（mmH2O/m）,

,,,（m³/min）,m/s,（m2）,（mm）,（mmH2O）,,直管平均比摩组,长度（M）,,局部阻力合,,静压合

,0-1,风罩1,30,18,0.0279,188.4,19.84,0.08,,,1.587,1.587,-21.424,-21.424

1,1-2,风管,30,18,0.0279,188.4,19.84,,2.106,1,2.106,3.693,-2.106,-23.529

,2-3,弯管（90°）,30,18,0.0435,235.5,19.84,0.39,,,7.736,11.429,-7.736,-31.266

,3-4,风管,30,18,0.0279,188.4,19.84,,2.106,15,31.587,43.016,-31.587,-62.853

,4-5,弯管（90°）,30,18,0.1115,376.8,19.84,0.39,,,7.736,50.753,-7.736,-70.589

,5-6,风管,30,18,0.0279,188.4,19.84,,2.106,10,21.058,71.811,-21.058,-91.647

,6-7,合流管主管,50,18,0.0279,188.4,19.84,0.2,,,3.967,75.778,-3.967,-95.615

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,编号,名称,排风量（Q）,风速（V）,面积（A）,管径（D),速度压（Pv）,压损系数/局部阻力系数,直管（mmH2O/m）,,压力损失（mmH2O/m）,,静压（mmH2O/m）,

,,,（m³/min）,m/s,（m2）,（mm）,（mmH2O）,,直管平均比摩组,长度（M）,,局部阻力合,,静压合

,0`-1`,风罩2,20,18,0.0185,153.70,19.84,0.99,,,19.638,19.638,-39.475,-39.475

,1`-2`,风管,20,18,0.0185,153.70,19.84,,2.581,1,2.581,22.220,-2.581,-42.056

2,2`-3`,弯管（90°）,20,18,0.0290,192.13,19.84,0.39,,,7.736,29.956,-7.736,-49.793

,3`-4`,风管,20,18,0.0185,153.70,19.84,,2.581,4.5,11.616,41.571,-11.616,-61.408

,4`-5`,弯管（90°）,20,18,0.0742,307.40,19.84,0.39,,,7.736,49.308,-7.736,-69.145

,5`-6`,风管,20,18,0.0185,153.70,19.84,,2.581,6,15.487,64.795,-15.487,-84.632

,6`-7`,弯管（90°）,20,18,0.0742,307.40,19.84,0.39,,,7.736,72.531,-7.736,-92.368

,7`-8`,风管,20,18,0.0185,153.70,19.84,,2.581,4,10.325,82.856,-10.325,-102.693

,8`-9`,弯管（60°）,20,18,0.0742,307.40,19.84,0.15,,,2.976,85.832,-2.976,-105.669

,9`-7,合流管主管,50,18,0.0185,153.70,19.84,0.28,,,5.554,91.386,-5.554,-111.223

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结论1,,·按照并联压力损失相等的原理：,,（0-7）的压力损失等于（0`-7）的压力损失,,,,（0`-7）直管压损系数*速度压Pv1=,,54.75,,∴（0`-7）局部阻力系数=,,3.82

,,∴（0-7）局部阻力系数*速度压=,,91.39,,,,直管的压损阻力系数=,2.76,,,,,

,,,∴速度压=,23.92,风速=,19.97,,,,,,,,

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,编号,名称,排风量（Q）,风速（V）,面积（A）,管径（D),速度压（Pv）,压损系数/局部阻力系数,直管（mmH2O/m）,,压力损失（mmH2O/m）,,静压（mmH2O/m）,

,,,（m³/min）,m/s,（m2）,（mm）,（mmH2O）,,直管平均比摩组,长度（M）,,局部阻力合,,静压合

修正1,0-1,风罩,30,19.97,0.0250,178.60,23.92,0.08,,,1.914,1.914,-25.836,-25.836

,,所有风管,30,19.97,0.0250,178.60,23.92,,2.679,26,69.651,71.564,-69.651,-95.487

,2-3,弯管（90）,30,19.97,0.0250,223.25,23.92,0.39,,,9.330,80.894,-9.330,-104.817

,4-5,弯管（90）,30,19.97,0.0250,357.20,23.92,0.39,,,9.330,90.224,-9.330,-114.147

,6-7,合流管,50,19.97,0.0417,230.57,23.92,0.2,,,4.785,95.008,-4.785,-118.931

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,编号,名称,排风量（Q）,风速（V）,面积（A）,管径（D),速度压（Pv）,压损系数/局部阻力系数,直管（mmH2O/m）,,压力损失（mmH2O/m）,,静压（mmH2O/m）,

主管,,,（m³/min）,m/s,（m2）,（mm）,（mmH2O）,,直管平均比摩组,长度（M）,,局部阻力合,,静压合

,7-8,风管主管,50,19.47,0.0428,233.5,23.21,,1.988,7.5,14.910,109.919,-38.120,-157.051

,8-9,合流主管,75,19.47,0.0642,285.98,23.21,0.2,,,4.642,114.561,-4.642,-161.693

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,编号,名称,排风量（Q）,风速（V）,面积（A）,管径（D),速度压（Pv）,压损系数/局部阻力系数,直管（mmH2O/m）,,压力损失（mmH2O/m）,,静压（mmH2O/m）,

,,,（m³/min）,m/s,（m2）,（mm）,（mmH2O）,,直管平均比摩组,长度（M）,,局部阻力合,,静压合

3,0``-1``,风罩,25,18.00,0.0231,172.1,19.84,0.25,,,4.959,4.959,-24.796,-24.796

,1``-2``,风管,25,18.00,0.0233,172.1,19.84,,2.305,4,9.221,14.180,-9.221,-34.017

,2``-3``,弯管（90）,25,18.00,0.0363,215.1,19.84,0.39,,,7.736,21.917,-7.736,-41.753

,3``-4``,风管,25,18.00,0.0233,172.1,19.84,,2.305,3,6.916,28.832,-6.916,-48.669

,4``-5``,弯管（90）,25,18.00,0.0523,258.2,19.84,0.39,,,7.736,36.569,-7.736,-56.405

,5``-6``,风管,25,18.00,0.0233,172.1,19.84,,2.305,5,11.526,48.095,-11.526,-67.932

,6``-7``,弯管（90）,25,18.00,0.0523,258.2,19.84,0.39,,,7.736,55.831,-7.736,-75.668

,7``-8``,风管,25,18.00,0.0233,172.1,19.84,,2.305,4,9.221,65.052,-9.221,-84.889

,8``-9``,弯管（60）,25,18.00,0.0523,258.2,19.84,0.15,,,2.976,68.028,-2.976,-87.865

,9``-9,合流管,75,18.00,0.0233,172.1,19.84,0.28,,,5.554,73.582,-5.554,-93.419

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结论1,,·按照并联压力损失相等原理：,,（0-9）的压损等于（0``-9``）的压损：,,,（0``-9``）直管压损系数*速度压Pv1=,,,36.88,,∴（0``-9``）局部阻力系数=,,3.71

,,（0``-9``）局部阻力系数*速度压=,,114.56,,,,直管的压损系数=,,1.86,,,,

,,,∴速度压=,30.88,,,,,,,,,,

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,编号,名称,排风量（Q）,风速（V）,面积（A）,管径（D),速度压（Pv）,压损系数/局部阻力系数,直管（mmH2O/m）,,压力损失（mmH2O/m）,,静压（mmH2O/m）,

修正3,,,（m³/min）,m/s,（m2）,（mm）,（mmH2O）,,直管平均比摩组,长度（M）,,局部阻力合,,静压合

,0``-1``,风罩,25,22.69,0.0184,152.96,30.88,0.25,,,7.721,7.721,-38.605,-38.605

,,所有风管,25,22.69,0.0184,152.96,30.88,,4.038,16,64.613,72.334,-64.613,-103.218

,2``-3``,弯管（90）,25,22.69,0.0184,191.19,30.88,0.39,,,12.045,84.379,-12.045,-115.263

,4``-5``,弯管（90）,25,22.69,0.0184,229.43,30.88,0.39,,,12.045,96.423,-12.045,-127.307

,6``-7``,弯管（90）,25,22.69,0.0184,229.43,30.88,0.39,,,12.045,108.468,-12.045,-139.352

,8``-9``,弯管（60）,25,22.69,0.0184,229.43,30.88,0.15,,,4.633,113.101,-4.633,-143.985

,9``-9,合流管,75,22.69,0.0551,264.93,30.88,0.28,,,8.648,121.748,-8.648,-152.632

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,编号,名称,排风量（Q）,风速（V）,面积（A）,管径（D),速度压（Pv）,压损系数/局部阻力系数,直管（mmH2O/m）,,压力损失（mmH2O/m）,,静压（mmH2O/m）,

4,,,（m³/min）,m/s,（m2）,（mm）,（mmH2O）,,直管平均比摩组,长度（M）,,局部阻力合,,静压合

,9-10,风管主管,75,19.45,0.0643,286.1,23.17,,1.620,8,12.958,127.519,-12.958,-174.651

,10-11,旋风除尘器,,静压损失为=PR-(PV1-PV2)=,,,62.95,,,,80.000,207.519,-62.952,-237.603

,11-12,风管,75,10,0.1256,400,6.12,,0.306,1.5,0.459,207.978,-0.459,-238.062

,12-13,弯管（90）,75,10,0.1963,500,6.12,0.39,,,2.388,210.365,-2.388,-240.450

,13-14,风管,75,10,0.1256,400,6.12,,0.306,1.5,0.459,210.825,-0.459,-240.909

,14-15,弯管（90）,75,10,0.1963,500,6.12,0.39,,,2.388,213.212,-2.388,-243.297

,15-16,风管,75,10,0.1256,400,6.12,,0.306,2.5,0.765,213.978,-0.765,-244.062

,16-17,弯管（90）,75,10,0.1963,500,6.12,0.39,,,2.388,216.365,-2.388,-246.450

,17-18,风管,75,10,0.1256,400,6.12,,0.306,1.5,0.459,216.825,-0.459,-246.909

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,编号,名称,排风量（Q）,风速（V）,面积（A）,管径（D),速度压（Pv）,压损系数/局部阻力系数,直管（mmH2O/m）,,压力损失（mmH2O/m）,,静压（mmH2O/m）,

,,,（m³/min）,m/s,（m2）,（mm）,（mmH2O）,,直管平均比摩组,长度（M）,,局部阻力